Mold for plastic material



UNITED STATES PATENT OFFICE.

HARRY W. JAYNE, OF PHILADELPHIA, PENNSYLVANIA.

MOLD FOR PLASTIC MATERIAL.

SPECIFICATION forming part of Letters Patent No. 422,221, dated February 25, 1890.

Application filed November 11, 1889. Serial No. 329,879. (No model.)

To a/ZZ when?, it may concern:

Be it known that I, HARRY MAINE, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Molds for Plastic Material, of which the following is a specilication. y

The object of my invention is to construct a mold in which are formed balls of material such as naphthaline.

In the accompanying drawings, Figure l is a side view, partly in section, of myimproved mold. Fig. 2 is a transverse section on the line l 2, Fig. l. Fig. 3 is an enlarged sectional view` of a portion of the mold. Fig. 4c is a perspective view of a cope-plate. Fig. 5 is a perspective view of the drag-plate, and Fig. G is a perspective vieW of the pinplate.

A Aare the standards, on Which are mounted the heads B B, tied together by the longitudinal beams D. B forms one head of the mold, and B the opposite head of the mold,

' and between these two plates are a series ot' mold-plates a and h, supported on the longitudinal beams D, as shovvn clearly in Figs. l and 2, the Whole being Jlamped together by a set-screw d, having al its outer end ahandlever d', so that when all the plates are in condition ready for pouring they are clamped together by this setscrew.

In forming the plates a, I make two castings a a', as shown in Fig. 4, recessed at the back, forming when the two plates are placed back to back a Water-space E for the purpose of keeping the molds cool. The faces of the plates a are cupped, as shown, to mold one half of the ball, the other half of the ball being formed in the plate Z2, as shown in Fig. 3. The rears of the plates Z2 are also recessed, as shown in Fig. 5, and connecting this recessed portion with the cupped face are a series of tapered channels c,to allow the material to be molded to flow into the several cavities a, formed by the two cupped faces of the plates d and h.

A gauze or perforated sheet f is placed in each pouring-cavity F, so that when the naph thaline, for instance, is poured into the mold Athrough the pipe g.

it- Will flow through the gates or passages c into the different chambers x and around the sheet f, and when cool the plates a and l) are released, and the block of material clinging to the sheet f in the space F is removed, together with the portions projecting into the tapered channels c, these portions being severed from the balls at the neck. Owing to the cooling ot the plate a the balls will ten-d to adhere to the plate h, and to remove the balls from the plate b a plate J is used, Fig. G, having a series of pins e' the same distance apart as the openings or gates c in the plate Z9, so that by inserting these pins into the openings the balls are forced into their seats in the plate. n v

Tater is admitted to the space E through the pipe g, and the overflow passes out These pipes are connected to suitable reservoirs.

It Will be understood that the cavities a; in the plate may be of other forms than spherical, depending altogether upon the shape required, and other material than naphthaline may be molded.

I claim as my invention-` 1. The combination, in a mold, ot the supporting frame, the hollow plate c, having moldingoa\'ities in its face, With a plate b, having molding cavities corresponding to the cavities in the plate a and a recess at its back forming a pouring-space, With'channels connecting the pouring-space With the cavities, substantially as speeied.

2. In a mold, the combination of the two plates a` a', the faces of Which are cupped With recesses at the backs of said plates, said plates when secured together forming a Waterchamber with water inlets and outlets, substantially as specified.

3. The combination, in a mold, of the frame, the plates mounted on said frame, one of said plates having its faces cupped form-= ing the molding-chamber, a Water-chamber in one of said plates and a pouring-chamber in the other plate, the cup portions with the pouringspace, With a perforated sheet in said pouringespace, substantially as andfor the purpose set forth.

4. The combination of a plate of a mold' (In testimony whereof I have signed my cupped on one surface Wit-li a series of gates name to this specification iu the presence of or passages passing through the plate to the two subscribing Witnesses.

cupped surfaces, with a plate I, having a se- HARRY V. JAYNE. ries of pins i, spaced to correspond with the Vitnesses:

gates or passages, substantially as and for the HENRY HOWsoN,

purpose set forth. HARRY SMITH. 

